You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages aicontinue="Bloodelemental.gif" />
  </query-continue>
  <query>
    <allimages>
      <img name="Balron.gif" timestamp="2009-01-21T14:32:44Z" url="https://wiki.uosecondage.com/w/images/5/56/Balron.gif" descriptionurl="https://wiki.uosecondage.com/File:Balron.gif" ns="6" title="File:Balron.gif" />
      <img name="Bankboxgold.png" timestamp="2010-10-29T22:17:34Z" url="https://wiki.uosecondage.com/w/images/3/37/Bankboxgold.png" descriptionurl="https://wiki.uosecondage.com/File:Bankboxgold.png" ns="6" title="File:Bankboxgold.png" />
      <img name="Black_Gate_21_flat.jpg" timestamp="2011-05-07T19:38:51Z" url="https://wiki.uosecondage.com/w/images/0/0c/Black_Gate_21_flat.jpg" descriptionurl="https://wiki.uosecondage.com/File:Black_Gate_21_flat.jpg" ns="6" title="File:Black Gate 21 flat.jpg" />
      <img name="Black_Gate_title_only_602x133.jpg" timestamp="2011-05-07T18:59:23Z" url="https://wiki.uosecondage.com/w/images/2/27/Black_Gate_title_only_602x133.jpg" descriptionurl="https://wiki.uosecondage.com/File:Black_Gate_title_only_602x133.jpg" ns="6" title="File:Black Gate title only 602x133.jpg" />
      <img name="Black_gate_overview_map.jpg" timestamp="2011-05-07T19:22:14Z" url="https://wiki.uosecondage.com/w/images/a/a5/Black_gate_overview_map.jpg" descriptionurl="https://wiki.uosecondage.com/File:Black_gate_overview_map.jpg" ns="6" title="File:Black gate overview map.jpg" />
      <img name="Blackfoot_Cobalt.jpg" timestamp="2013-02-03T23:27:44Z" url="https://wiki.uosecondage.com/w/images/6/62/Blackfoot_Cobalt.jpg" descriptionurl="https://wiki.uosecondage.com/File:Blackfoot_Cobalt.jpg" ns="6" title="File:Blackfoot Cobalt.jpg" />
      <img name="Blacksmith.png" timestamp="2010-10-31T17:44:32Z" url="https://wiki.uosecondage.com/w/images/b/be/Blacksmith.png" descriptionurl="https://wiki.uosecondage.com/File:Blacksmith.png" ns="6" title="File:Blacksmith.png" />
      <img name="Bladespirits.gif" timestamp="2009-12-16T01:31:26Z" url="https://wiki.uosecondage.com/w/images/3/37/Bladespirits.gif" descriptionurl="https://wiki.uosecondage.com/File:Bladespirits.gif" ns="6" title="File:Bladespirits.gif" />
      <img name="Blaise.jpg" timestamp="2013-02-03T23:27:51Z" url="https://wiki.uosecondage.com/w/images/d/d8/Blaise.jpg" descriptionurl="https://wiki.uosecondage.com/File:Blaise.jpg" ns="6" title="File:Blaise.jpg" />
      <img name="Blcklich.gif" timestamp="2009-02-03T01:11:31Z" url="https://wiki.uosecondage.com/w/images/8/82/Blcklich.gif" descriptionurl="https://wiki.uosecondage.com/File:Blcklich.gif" ns="6" title="File:Blcklich.gif" />
    </allimages>
  </query>
</api>